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. 2011 Feb 4;106(5):052501.
doi: 10.1103/PhysRevLett.106.052501. Epub 2011 Jan 31.

Precise extraction of the induced polarization in the 4He(e,e'p)3H reaction

S P Malace  1 , M Paolone, S Strauch, I Albayrak, J Arrington, B L Berman, E J Brash, B Briscoe, A Camsonne, J-P Chen, M E Christy, E Chudakov, E Cisbani, B Craver, F Cusanno, R Ent, F Garibaldi, R Gilman, O Glamazdin, J Glister, D W Higinbotham, C E Hyde-Wright, Y Ilieva, C W de Jager, X Jiang, M K Jones, C E Keppel, E Khrosinkova, E Kuchina, G Kumbartzki, B Lee, R Lindgren, D J Margaziotis, D Meekins, R Michaels, K Park, L Pentchev, C F Perdrisat, E Piasetzky, V A Punjabi, A J R Puckett, X Qian, Y Qiang, R D Ransome, A Saha, A J Sarty, E Schulte, P Solvignon, R R Subedi, L Tang, D Tedeschi, V Tvaskis, J M Udias, P E Ulmer, J R Vignote, F R Wesselmann, B Wojtsekhowski, X Zhan; E03-104 Collaboration
Affiliations

Precise extraction of the induced polarization in the 4He(e,e'p)3H reaction

S P Malace et al. Phys Rev Lett. .

Abstract

We measured with unprecedented precision the induced polarization P(y) in (4)He(e,e'p)(3)H at Q(2)=0.8 and 1.3 (GeV/c)(2). The induced polarization is indicative of reaction-mechanism effects beyond the impulse approximation. Our results are in agreement with a relativistic distorted-wave impulse approximation calculation but are overestimated by a calculation with strong charge-exchange effects. Our data are used to constrain the strength of the spin-independent charge-exchange term in the latter calculation.

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